2009 ... David A. Varathungarajan, Scott M. Garfield and Stephen G. Wright · The objective of this project was to develop an improved correlation between Texas Cone Penetrometer (TCP) blow count and undrained shear strength for soft, clay soils in the upper approximately 30 feet of the ground. Subsurface explorations were carried out by

2008 ... Stephen G. Wright, Scott M. Garfield and David A. Varathungarajan · The Texas Department of Transportation (TxDOT) routinely performs Texas Cone Penetrometer (TCP) tests as part of soil site investigations. Often data from these tests are the only data available for estimating soil undrained shear strengths for preliminary

2008 ... Stephen G. Wright, Kuo-Hsin Yang and Jorge G. Zornberg · The Texas Department of Transportation (TxDOT) is experiencing wider use of Mechanically Stabilized Earth (MSE) Walls placed adjacent to an existing stable wall. In numerous cases, the space (width) available for the new wall is less than the width established in

2007 ... Kenneth T. Kniss, Stephen G. Wright, Kuo-Hsin Yang and Jorge Zornberg · Widening of existing highways often results in new mechanically stabilized earth (MSE) walls being placed in front of existing stable walls. The design of these walls is unique because limited right-of-way often forces the length of the reinforcing strips to be

2007 ... RS: Stephen G. Wright; Researchers: Ken Kniss, Kuo-Hsin Yang and Jorge Zornberg · Widening of existing highways often results in new mechanically stabilized earth (MSE) walls being placed in front of existing walls or slopes. The design of these walls is unique because limited right-of-way often forces the length of the

2006 ... Ellen M. Rathje [and five others] · This study evaluated currently available, non-nuclear devices as potential replacements for the nuclear gauge for soil compaction control. Devices based on impact methods, electrical methods, and stiffness methods were identified and evaluated through two field studies and two laboratory

2006 ... RS: Ellen Rathje; Researchers: Kenneth Stokoe, Stephen Wright · The performance of earth retaining walls and embankments is predominantly controlled by the engineering properties of the backfill. To ensure that the backfill has adequate properties, the soil is compacted to achieve a specified minimum dry unit weight and a water

2006 ... Stephen G. Wright · A number of TxDOT-sponsored studies and research projects have been conducted over the years regarding shear strength and slope stability issues of embankments. These projects span approximately 15 years, and each developed relationships and theories for soil strength relationships in different

2005 ... Steohen G. Wright · TxDOT is experiencing wider use of multi-tiered MSE and Concrete Block retaining walls. These walls often involve loads and geometric configurations that are different from the ones for which current FHWA and AASHTO design guidelines were developed. Accordingly, the current research project was

2004 ... Wade N. Osborne and Stephen G. Wright · Current AASHTO and FHWA design guidelines for MSE walls are with particular emphasis on multi-tiered wall systems. Current software including the MSEW 2.0 design software and the general-purpose slope stability software known as UTEXAS4 are also examined with emphasis placed on

2001 ... by Brad J. Arcement, Stephen G. Wright · TxDOT utilizes a number of sources of cohesionless soils as fill materials for embankment construction and as backfill for mechanically stabilized earth (MSE) walls. Some problems have been experienced with these materials in the past, especially with settlements of backfills behind

1997 ... by A.A. Saleh and Stephen G. Wright · The Texas Department of Transportation has experienced many small slides in earth embankments that are constructed of highly plastic clays. The purpose of this report is to address several issues related to design of new slopes and evaluation of remedial measures to repair slides in

1997 ... by Jeffrey Alan Fippin and S.G. Wright · Clay embankments along Texas highways have been prone to shallow slope failures that ocur a number of years after construction. Typical embankments that have failed are constructed of highly plastic clays, with heights ranging from 3 to 9 m (10 to 30 ft) and their side slopes at 2:1 or

1991 ... by Mohamad K. Kayyal and Stephen G. Wright · Shallow slope failures in compacted highly plastic clay embankments have been a common problem along Texas highways. Recent studies had shown that shallow slides might be the result of cyclic wetting and drying that takes place in the field. The purpose of this study was to

1991 ... by Douglas O'Neal Bell, Stephen G. Wright · Previous research has indicated that the rate at which soil dries influences the incidence and severity of cracking in soil. Cracking of soil is caused by tensile stresses created by unequal shrinkage strains which develop because the soil surface dries more quickly than the interior of the soil.

1987 ... by Earl V. Edris Jr. and Stephen G. Wright · This report is the user's guide volume of the UTEXAS2 (University of Texas Analysis of Slopes - version 2) slope-stability package. This package describes a slope-stability program which can calculate the factor of safety by Spencer's method, simplified Bishop's procedure, force

U.S. Army Corps of Engineers GL-87-1 vol.1 ... U.S. Army Corps of Engineers GL-87-1 vol.1 ... Instruction

1987 ... by Stephen G. Wright and J.M. Duncan · 'Sudden' or 'rapid' drawdown is considered to occur when reservoir or other adjacent water levels are lowered at such a rate that little or no drainage occurs in an earth slope at the time the water level is being lowered. Slope stability analyses are routinely performed to calculate the

U.S. Army Corps of Engineers GL-87-25 ... U.S. Army Corps of Engineers GL-87-25 ... Miscellaneous Paper

1987 ... by Edward S. O'Malley, Stephen G. Wright · This report presents the results of a study conducted to evaluate the various laboratory test methods used by the Texas State Department of Highwyas and Public Transportation for determining the undrained shear strengths of clays. Shear tests were performed using the

1986 ... by Christopher W. Swan, Stephen G. Wright · This report presents the results of theoretical studies performed to understand and be able to predict better the response of "short" drilled shafts. A "short" drilled shaft has been defined as a shaft which undergoes less than two points of zero deflection when subjected to lateral loads.

1986 ... by Laura E. Rogers, Stephen G. Wright · This report describes results of a series of laboratory tests performed to understand better the strength properties of highly plastic clays used in the construction of embankments in Texas. Previous studies showed that such embankments failed by sliding many years (10-30) after

1986 ... by Roger Green and Stephen G. Wright · This report describes results of an ongoing study of the stability of embankments constructed of highly plastic clays in Texas. Previous studies showed that such embankments failed by sliding many (10-30) years after construction and that the apparent shear strengths were substantially

1984 ... Stephen G. Wright and James D. Roecker · A series of seven example slope stability problems for the computer program, UTEXAS, is presented. The example problems consist of (1) a simple slope, (2) an embankment on a very strong foundation, (3) an embankment on a relatively weak foundation, (4) an excavated slope, (5) an

1984 ... Peter A. Stauffer and Steohen G. Wright · Slope stability problems encountered by the Texas State Department of Highways and Public Transportation have been identified and examined. Problems have been encountered with cut and natural slopes, embankment foundations, and the embankment slopes themselves. The

1984 ... Alexander W. Gourlay and Stephen G. Wright · This report presents the results of the first series of tests performed to measure the long-term strength properties of "Beaumont" clay. The soil tested in this study was taken from several embankments which have experienced slope failures in District 12 of the Texas State Department of

1984 ... Frank Y. Wadlington · Prepared by State Department of Highways and Public Transportation | Numerous embankment slope failures occurring in District 12 have prompted a need for reviewing the current design criteria, and remedial actions taken, as a means of solving the problem of embankment failures. · "May 1984"; Includes,

1984 ... Stephen G. Wright and James D. Roecker · A general purpose computer program has been developed for the Texas State Department of Highways and Public Transportation for use in performing slope stability calculations. The computer program includes a number of improvements over a previous computer program

1983 ... Stephen G. Wright · Personnel from the Center for Transportation Research visited a number of sites in Texas SDHPT district 12 and Houston Urban to observe slides which had occurred in earth embankments. the problems with earth slopes were discussed with personnel of the Texas SDHPT and it was determined that a major

1974 ... Rudolph J. Schweizer and Stephen Wright · The results of a literature survey undertaken to identify remedial measures which have been used to stabilize earth slopes are presented. In this review attention is directed to specific case histories and field conditions where the remedial measures were actually used. The remedial

1972 ... Timothy G. Abrams and Stephen Wright · The results of a survey undertaken to identify regions in Texas where there has been a high incident rate of slope failure and to identify some of the factors responsible for these slides are presented. In conjunction with this study a review of present slope design procedures and the